ANN ARBOR -- Michigan has known for more than a week now that senior Fitz Toussaint will be its starting running back Saturday when the season opens against Central Michigan (3:30 p.m., BTN).

But who will be the first man off the bench when Toussaint needs a rest?

The Wolverines allowed six running backs to fight for the No. 1 job this fall, and listed all six -- including Toussaint -- on their depth chart Monday. Redshirt freshman Drake Johnson is listed as the team's No. 2 runner, followed by Justice Hayes and Thomas Rawls. Freshmen Derrick Green and De'Veon Smith appear to be tied for the No. 5 spot on the depth chart.

"Who knows, I don't know," Michigan offensive coordinator Al Borges said Tuesday. "Fitz is going to be our starting running back, and we're going to play it by ear and go from there.

"I don't have an answer to that question. Fitz is going to be the running back, and we're just going to see how things go."

On Monday afternoon, Michigan coach Brady Hoke said all six will see the field in some capacity -- whether it be on special teams or in the backfield on offense.

He's put all six on the depth chart, all six are expected to be on the travel squad.

Meaning, they're not just going to stand around and take up space.

“We recruited two freshmen we’re really proud to have here and think they’re going to be good football players," Hoke said Monday. "But a guy like Drake Johnson is a guy who really has done a tremendous job all through his time at Michigan. We were fortunate enough last year to redshirt him, and (with) the job he did on the look team and the job he did during bowl practices, we thought 'this guy’s got a great chance.'

“Thomas Rawls and Justice have competed at a high level. Fitz is back, and you can see it.”

Hoke says, in a perfect world, his starting running back will get anywhere from 18 to 30 carries per game in Borges' new pro-style offense.

Earlier in camp, he and Borges both anticipated playing more than one back in the season opener and possibly beyond that.

But Toussaint has clearly been head and shoulders above the rest, and that discussion seems to have changed a bit.

Mostly, Borges says, because he knows the entire offensive package -- whether it be a run play or a pass protection. The younger players, notable Green and Smith, just don't yet.

"Fitz is a hard worker, he goes hard every single down and he's got great feel for our system and our run game, and everything," Borges said. "And he looks comfortable. He doesn't look like he's really missed a beat. We haven't hit him too much, we've hit him some (in camp).

"But this will be a good test for him in this game. To get some carries, get knocked around and make sure he feels good about his (leg)."